1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.maven.repository.legacy.resolver.conflict;
20
21 import javax.inject.Named;
22 import javax.inject.Singleton;
23
24 import org.apache.maven.artifact.resolver.ResolutionNode;
25 import org.apache.maven.artifact.versioning.ArtifactVersion;
26 import org.apache.maven.artifact.versioning.OverConstrainedVersionException;
27
28 /**
29 * Resolves conflicting artifacts by always selecting the <em>oldest</em> declaration. Oldest is defined as the
30 * declaration whose version is less according to <code>ArtifactVersion.compareTo</code>.
31 *
32 * @see ArtifactVersion#compareTo
33 * @since 3.0
34 */
35 @Named("oldest")
36 @Singleton
37 @Deprecated
38 public class OldestConflictResolver implements ConflictResolver {
39 // ConflictResolver methods -----------------------------------------------
40
41 /*
42 * @see org.apache.maven.artifact.resolver.conflict.ConflictResolver#resolveConflict(org.apache.maven.artifact.resolver.ResolutionNode,
43 * org.apache.maven.artifact.resolver.ResolutionNode)
44 */
45
46 public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {
47 try {
48 ArtifactVersion version1 = node1.getArtifact().getSelectedVersion();
49 ArtifactVersion version2 = node2.getArtifact().getSelectedVersion();
50
51 return version1.compareTo(version2) <= 0 ? node1 : node2;
52 } catch (OverConstrainedVersionException exception) {
53 // TODO log message or throw exception?
54
55 return null;
56 }
57 }
58 }